This small project is a hall which serves as an extension to an office building, The present entrance is on the south side of the building, The client requested that the entrance be changes to the east side of the building.The original entrance of the building was on the southern side of the building, but the client wanted to set the entrance to the eastern side of the building. The extension poses a challenge to the design of the hall. At present there are two apartment buildings on the south and north sides of the building. They are constructed in different periods of time. A small private path connects the site with the city road. The original building was painted black to turn it into a background to the new extension, which is paints white. The extension s curved interior creates a space that transforms. The visitor’s traditional expectations of perspectival space, The visitor’s awareness of the problems of perspective and the perception of space.